Admitting it was hard to see Proud sentenced at Brisbane District Court on Monday, the 33-year-old recalled the moment he turned violent on November 8, 2015 when Kadadi drove the couple home from a friend's wedding.

"He started smashing his phone into my windscreen and then threw his phone out the window. "

"Without saying a word, he started punching me in the chest. I was petrified," the single mother told the program.

"I remember thinking 'he's going to kill me' and I remember begging him, thinking 'act weak', begging him, please, please, 'my son, my son', trying to get some rationality into his brain. I'm someone that he loved... Somehow I ran out of that house."

Kadadi lost more than a litre of blood and was hospitalised for more than a month with a brain haemorrhage.

"They have different levels of brain injury and the highest is horrific, and mine was horrific brain injury," Kadadi said on Monday night.

"There were people in there that had had brain injuries by getting hit from cars, and I had been put in the same place by a man's bare fist."

On Monday, Judge Tony Moynihan said the ordeal had a "profound effect" on Kadadi's life. Proud pleaded guilty to inflicting grievous bodily harm and wilful damage.